Move static methods out of CSSLengthInterpolationType to LengthInterpolationFunctions

third_party/WebKit/Source/core/animation/CSSLengthPairInterpolationType.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CSSLengthPairInterpolationType_h
 #define CSSLengthPairInterpolationType_h
 
-#include "core/animation/CSSLengthInterpolationType.h"
 #include "core/animation/CSSLengthListInterpolationType.h"
+#include "core/animation/LengthInterpolationFunctions.h"
 #include "core/animation/ListInterpolationFunctions.h"
 #include "core/css/CSSValuePair.h"
 
 namespace blink {
 
 class CSSLengthPairInterpolationType : public CSSLengthListInterpolationType {
 public:
     CSSLengthPairInterpolationType(CSSPropertyID property)
         : CSSLengthListInterpolationType(property)
     { }
 
 private:
     InterpolationValue maybeConvertValue(const CSSValue& value, const StyleResolverState&, ConversionCheckers&) const final
     {
         const CSSValuePair& pair = toCSSValuePair(value);
         return ListInterpolationFunctions::createList(2, [&pair](size_t index) {
-            return CSSLengthInterpolationType::maybeConvertCSSValue(index == 0 ? pair.first() : pair.second());
+            const CSSValue& item = index == 0 ? pair.first() : pair.second();
+            return LengthInterpolationFunctions::maybeConvertCSSValue(item);
         });
     }
 };
 
 } // namespace blink
 
 #endif // CSSLengthPairInterpolationType_h